Bug 997 – [Regression] Struct-returning function that conditionally passes the result of another function straight through doesn't work (NRVO bug?)

I found this when one of my programs had stopped working. Clearly there is work to be done to get NRVO behaving itself. ---------- import std.stdio, std.string; struct Rect { int left, top, right, bottom; } int main() { print(sizeTest(false)); print(sizeTest(true)); print(defaultRect); return 0; } static Rect sizeTest(bool empty) { if (empty) { Rect result; return result; //return Rect.init; } else { return defaultRect; /+Rect result = defaultRect; return result;+/ } } void print(Rect r) { writefln("(%d, %d)-(%d, %d)", r.left, r.top, r.right, r.bottom); } Rect defaultRect() { return Rect.init; } ---------- (1, 4212215)-(0, 4291676) (0, 0)-(0, 0) (0, 0)-(0, 0) ---------- If I remove the if, or use either of the commented out portions instead, then I get the expected output: ---------- (0, 0)-(0, 0) (0, 0)-(0, 0) (0, 0)-(0, 0) ----------

Added to DStress as http://dstress.kuehne.cn/run/s/struct_28_A.d http://dstress.kuehne.cn/run/s/struct_28_B.d http://dstress.kuehne.cn/run/s/struct_28_C.d http://dstress.kuehne.cn/run/s/struct_28_D.d http://dstress.kuehne.cn/run/s/struct_28_E.d

Fixed DMD 1.013